The kinetics of the reactions of acetic anhydride-excess water has been studied at higher temperatures up to
366K under adiabatic conditions in a thermos-flask fitted with a negative coefficient thermistor and kinetic data reported
in this work. The same techniques were applied for the kinetic studies of excess acetic anhydride-water reactions
at higher temperature up to 368 K. The reaction kinetics of excess acetic anhydride-water reactions which has not
been determined previously was modeled using the same adiabatic analysis and the average activation energy, heat
of reaction, pre-exponential factor and the order of reaction with respect to water has been determined. The studies
have shown that the two processes appear to be completely different and might proceed through different reaction
mechanisms pathways for the production of acetic acid.